tory burch outlet TCF bleaching of Eucalyptus Kraf

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TCF Bleaching of Eucalyptus Kraft Pulp Research

DTPA dosage is 0.2%, the slurry viscosity can be increased by 1.2%, the whiteness increased by nearly 1%,[link widoczny dla zalogowanych], 80% obtained the whiteness of pulp. '3 Conclusions (1) Add H2O2 on eucalyptus kraft pulp conventional oxygen delignification has a good strengthening effect. Add 0.8% H2O2,[link widoczny dla zalogowanych], the most significant strengthening effect. At this point,[link widoczny dla zalogowanych], conventional KP pulp after oxygen delignification of pulp kappa number decreased 50.0%, 8.9; pulp brightness was also improved, reaching 60.9% ISO; while the viscosity is only more than that without H2O2 2.15% reduction. (2) eucalyptus kraft pulp bleaching in the H2O2 was activated before the pretreatment with KMnO4, H2O2 bleaching can effectively improve the efficiency of bleaching section, while maintaining the slurry under conditions of high viscosity greatly increased pulp brightness after bleaching. When the volume of KMnO4 with brightness of up to 0.6%, 81.7%,[link widoczny dla zalogowanych], when viscosity 968ml / g. (3) If, after pretreatment in KMnO4 on the pulp for another use of DTPA chelation treatment, the pulp brightness after bleaching there will be further improved. When the amount of 0.4% KMnO4, only 0.4% of the DTPA can get more than 80% brightness, and viscosity increased to 993ml. Therefore,[link widoczny dla zalogowanych], the activation of O2 by KMnO4 bleach, after DTPA (Q) processing, you can make eucalyptus kraft pulp after only a brief OMn / QP bleaching process can be more than 80% brightness, which means that the pulp can be fully realized short-TCF bleaching. Hunan Light Industry, ~-a7 and other College January 1999 【l2
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